Using PoF models to predict system reliability considering failure collaboration |
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Institution: | 1. Chair on Systems Science and Energetic Challenge, Fondation Electricite′ de France EDF, CentraleSupe′lec, Universite′ Paris-Saclay, Cha?tenay-Malabry 92290, France;2. School of Reliability and Systems Engineering, Beihang University, Beijing 100083, China |
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Abstract: | Existing Physics-of-Failure-based (PoF-based) system reliability prediction methods are grounded on the independence assumption, which overlooks the dependency among the compo-nents. In this paper, a new type of dependency, referred to as failure collaboration, is introduced and considered in reliability predictions. A PoF-based model is developed to describe the failure behavior of systems subject to failure collaboration. Based on the developed model, the Bisection-based Reliability Analysis Method (BRAM) is exploited to calculate the system reliabil-ity. The developed methods are applied to predicting the reliability of a Hydraulic Servo Actuator (HSA). The results demonstrate that the developed methods outperform the traditional PoF-based reliability prediction methods when applied to systems subject to failure collaboration. |
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Keywords: | Dependency Failure collaboration Physics-of-failure Reliability modeling Reliability prediction |
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